Question: Java program that counts the number of alphabetic ('A' to 'Z' in both upper and lower case) and digit ('1' to '3') characters in a

Java program that counts the number of alphabetic ('A' to 'Z' in both upper and lower case) and digit ('1' to '3') characters in a String. The method header is as follows:

public static int countNumAlphabetic (String str) {}

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